The weight of an adult platypus typically ranges from 1 to 5 pounds (0.5 to 2.3 kilograms). Like size, there can be some variation in weight among individual platypuses. Males and females are generally similar in size and weight, with males possibly being slightly larger on average.
Platypuses are small and lightweight mammals, well-suited to their semi-aquatic lifestyle, with adaptations that allow them to be agile and efficient in the water.